Robot cleaner



FIG. 1 is a perspective view of a robot cleaner showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is an exploded perspective view thereof showing the dust canister detached.

The broken lines represent unclaimed portions of the robot cleaner and form no part of the claimed design. 

CLAIM We claim the ornamental design for a robot cleaner, as shown and described. 